See

Carreg yr Imbill

Gimlet Rock

Photo: Alan Fryer, CC BY-SA 2.0 via Wikimedia Commons

About

The remains of a large granite outcrop and quarry.

Carreg yr Imbill is the remains of a large dolerite with pegmatite pods and quarry at Pwllheli, Gwynedd, Wales.
From Wikipedia · Carreg yr Imbill

Guide text adapted from the Wikivoyage article "Pwllheli" by its contributors, available under CC BY-SA 4.0. Read on Wikivoyage · Contributors · CC BY-SA 4.0
Summary from the Wikipedia article "Carreg yr Imbill", available under CC BY-SA 4.0. Wikipedia
Photo: Alan Fryer, CC BY-SA 2.0 via Wikimedia Commons